LED CAST CURE is a method to create microstructure (such as holographic effect, optical effect and so on)on printed film or paper through LED curing process. The general process includes two nip rolls, one is called as a master cylinder on which have holographic or other microstructure feature, and the other is pressure rubber roller. When film or paper pass through these two pressure, the holographic image on the master cylinder will be cast on the surface of film or paper. The LED curing lamp will dry LID lacquer on film or paper after casting process, so holographic or other microstructure will be on the surface as well. Compared with traditional UV cast and cure process, LED curing system use typical single wavelength, for example, 395nm or 385nm, which is easier pass through film if the lamp is installed on the back side of the film. Also LED curing system to use cold light source so curing temp is also lower than Traditional UV lamp. Because LED lacquer is single wavelength, so it will not by dried by visible light.
see the video link from Youtube